Pile.



L. E. WELSH.

PILE. APPLIGATIUN FILED renzo. 190e.

amnted Ma?. 8, ww.

SHEETS-SHEET 1.

T. WELSH.

PILE.

APPLIGATIOH $11.21 Emma, 1999.

Pa-@ma may.: 8, 1910.

2 EHBETS-SHEET 2.

Oui

.af "iirrr oriiigoit.

LOUIS E. WELSH, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOB, BY DIRECT ANDMESNE ASSIGNMENTS, TO AMERICAN CON CRETE PlLING COMPANY, OF PHILADEL-PHIA, PENNSYLVANIA; A CORPORATION OF JERSEY.

PILE.

Specification of Letters Patent.

Patented Mar. 8, 1910.

Application filed February 20, 1909. Serial Nrn 479,143.

'my invention to so construct a pile that it will carry a greater loadthan concrete )iles of the ordinary construction, and this o ject Iattain by toriniii a series of shoulders on the pile which wil bear uponthe earth at different points, thus materially increasing what may betermed the sui-,face friction.

'lhe pile is particularly adapted-for use in ground which ha an ,under;-.trata of quiclrsand and where it is desirable to ntilize the upperstrata to support the pile.

In the accompanying drawings Figure l, is a view in elevation of oneform of my improved pile, the shoulders being formed hf.' a series ofcorrugations; Fig. E. is a Similai' Yview to Fig. l, showing theShoulders in the forni of a spiral; Fig. 3, 'is a sectional view showingthe first step in innerting a pile of in v improved construction intothe ground; Fig. et, is a sectional View showing the second step in theprocess; Fig. 5, is n sectional view showin the completed pille withinthe ground; lig. 6, is a sectional' view Showing a modification of the'form of corrugatione; Fig. 7, is a view of another modification; Fig. 3,is a View showingth'e corrugatione toi-ined in a. tubularconerete pile,Fig. 9, is a view showing a modifica tion ot the shell illustrated inFig. S: Fie:A

i v h 10. is a view showing;f a. inodilication of the method of; drivingthe vpile into the ground; and Fig. l1, is a view showing only a portionof the pile corrugated.

Al-lcretofore concrete piles have usually heen made with a smoothsurface and of even diameter throughout their length, or have heeninailc with a smooth surface and tapered. These are the two forme otpiles now in common use.

Referring to the drawings A is the body portion of a concrete pilehavingIr a series-of ribs rf alternating with grooves n; the rihn.'

as illustrated in Fig. Y1. being ot annular forni, but in some instancesthey may be in the form of a spiral, as illustrated in Fig.

2, without departing from the essential features of the invention.

Y B is the point. of the pile which, in the present instance asillustrated in Fig. l, consists of a metallic-sectlon B and a concretesection B2; the metallic point in this instance being hollow and theconcrte of the pile ex 50 tending through the hollow section nd formingthe ext-reine lower end of the pile. In Fig. 2,' I have illustrated asolid point B3.

1`hc.corrugations in Fig. l, ane formed in a curve having the samecontour throughout,

but they may be formed as shown in Fig. '6, in which the lower edge ofthe rib o can be abrupt, as shown at a, or they may be. formed as at a,Fig. 7 'having square corners instead of round corners as shown in 7o Fig. l. The shape of the ribs may be modified in man)1 ways Withoutdeparting from the essential features ot the invention.

In order to properly insert such a pile into the ground l use the deviceclearly illustrated in Fig. 3. B is the point, B is the outer ringSection and C is the inner section of the point having,T a flange orestino' on a shoulder o on the ring section B', as i ustrated in theapplication for patent tiled by me on the 29th day of December 1908, under Serial No. 469,834. Attached to this,- inner section (l in thepresent instance is a tubular driving fornrv l), this forni 'is screwthreaded at its lower end and adapted to a screw thread on ari-extensionc on the inner Section of the point B. E ie-the driving head grooved atc to receive the upper end of the driving form D and surrounding this'driving forni is a protectiu7 casing F rest- 90 ing on a shoulder b andlie in central p0- sition by a flange b2 on the ring B in the presentinstance, and this protcting casing is adapted to a groove e in the headE.

Mounted between the driving form D and 95 the casing F, as illustratedin Fig. 3, is a corrugated tube/I and this tube can be made of ordinarycorrugated sheet. inetal bent into form and riveted, or may he made intubular form in the first instaure if desired, or instead of beingofi'forrnijated sheet metal this Section may he inade as Iehoun at I',Fig. S. ofa concrete Shell having a corrugated outer face Thecorrugationii may be inside as shown in Fi to any torni desired. Thenthis corrugated 8 or 9. or mayl bcinoditied 105 section is placedinfposition between the driving form D and the casing F the pile isdriven in the .ordinary manner and whenV driven to the depth desired.the- 'driving Aforinl with the central-sectionCof the'point, in thepresent instance, is removed leaving-the interiorzoif` the cor-ruat'ed'shellA exposed, anl

inspection can then e madez throughoutthe entire length-of the pile, or,onlarge piles, the earth under the pile canbedug 'out andproperly-preparedl to receive the 4 concrete as desired, andthen aconcrete filling is placed n the pile, 4.as indicated Ain Fig. 4, afterwiiih one pile after another isdriven, the earth is packedti litlylagainst the concrete pile and the -eart undereeachnorr'u ation" adds itssupport to the entire' ile, 'ma ng a Vvery substantial-support forth ingcapacity.

It will be readilyun erstoodthat the concrete shells shown. in Figs. 8or. 9 may be used in place of theV corrugated metal sections, and thatthese concrete shells' may be reinforced with metal embedded in theconway or at the top, depending upon the characterl ofearth into whichthe` crete' and' when Vsuchaforin is' used as in Fig. 9, I (prefer tomake the reinforce also corrugate so as to add, materially to thestrength ol the structure.

The body of the pile maybe reinforced and drive entirely by the' outer form, or casingF, as illustrated in'Fig. 10. In this con'- struction thepoint lsection is made solid and -the seat fori-the driving casing F isof sufficient width to receive the said casing and the corrugated tubemay rest within the flange onthe point section, so that the driv ingcasing-is eid firmly between the point and the head.

In some instances the pile may also be corrugated for a portion' ofitslength, as in Fig. 11,--.a- Udcthemcorru ated 'portion may be at thelower end, as s own in Fig. l1, or midlconsiderably While I 'prefer tointroduce the corrugated tubular shell into the 'ground at the [sainetime therhole is bein lornied to receive the pile, the shell mayintroduced intothe ole after it is formed without departing from theessential features of the invention.

While it isfnot absolutely essential to'have' the point of greaterdiameter than the protecting casing, I prefer to' make it larger' .so asto avoid as much as possible the skin friction in driving the pile. intothe ground,

the point secand .furthermore by making am enabled to tion larger thanthe casing more readily withdraw the casing after the pile has reachedthe depth required.

e outer casing F can be removed,- leavin theearth to come in directcontact with t e corrugations of the pile, and, when' e pile andincreasf therein.

1n any m anner desirable, and-iii some in-` stances'I may dispense'withthe inner form l. The process herein described'of intro ducing` acorrugated tube into the ground, said process consisting in providing asubstantially smooth-surfaced tubular element forming a combined drivingformand protective casing with a point section, mountin within saiddriving elementa corrugate tubular shell, forcing said driving elementby impact to forma hole in 'the ground and simultaneously introducingthe tubular shell therein, and then withdrawing the protective drivingeleinent and leaving the point section and corrugated shell within tli'e`ground.

: 2. The Aprocessherein 'described of introlf `ducing a corrugated tube`into the ground,

said rocess consisting in providing a driv ing 'orm and a substantiallysmooth-surfaced protective casing with a p oint section, mounting acorrugate tubular shell between the protective casing and the drivingform, forcing said driving form and casin by impact to form a hole Jinthe ground'an simultaneously 3. The process herein described oflforinintroducing the tubular shell ing a corrugated concrete pile, saidprocess form so as to ex o se the.

ground with the- 4. The process herein described of forming a corrugatedconcrete pile in the ground,

said process consistin in providing a sub#- stantially.- smooth-sur acedtubular element forming a combined driving form and protective casin intiiular shell,' forcing said driving element 'by impact to form a holein the ground and simultaneously introducing the tubular shell therein,'filling said corrugated shell with concrete, and then withdrawing theprotective driving element and leaving the point section and coi'ru atedshell within the ground ywith the bo yportion of concrete.

In testimony whereof, I have signed my naine to this specification, inthe presence of two subscribing Witnesses.

Louis E.

Witnesses:

Jos. H. KLniN, IVM. A. BARR.-

with a point Section, mountf, within said'drving element a corrugated

